feeling anxious and excited

i go friday 9-15-17 for first ultradound ill be 8 weeks according to my last period but its my first appointment so idk for sure how far along I am I'm extremely nervous cause I'm febuary I mis carried at 10 weeks baby measured 6 weeks was dead for 4 weeks body didn't register it although if I was paying attention my symptoms stopped but so far I've got gas bloating nausea sore books back aches light cramping that comes and goes no bleeding so I'm praying this pregnancy is healthy and doesn't have chromosomal abnormalities